. >> reporter: well gasia, we are at buchanan field in concord. about 257 aircrafts take off and land on this runway every day. and the faa employees that work in this control tower right next to us, they guide those pilots in and out of the area safely. the control tower in this airport the ones in livermore, napa, santa rosa and concord are all on a list that may have their control towers shut down. if a deal on the federal budget isn't reached by the end of next week. a company that provides fuel, parking and other services to planes here say without a control tower, air traffic would plummet and business would nose dive. many of the corporate jets will not come to an airport without a control tower. he says those corporate jets make up about 80% of his business. >> it's really dangerous to operate without the tower. a lot of our business jet carriers will not surf the airport if they are shut down. i may be faced with having to lay employees off. >> reporter: over the phone he explained that most planes would still be able to take off and land